Lolz

[Tina]

Everybody else here is entirely incorrect, and its unbelievable to what a degree.
LOL is the signular form, and [LOLZ] is simply the plural.
Meaning [lols] or more than one lol.
Adding a [lowercase] z at the end (Proper form, [LOLz], or [LoLz] to switch between capitals and lowercase as is commonly done by a number of prepubescent horny teens, namely girls) does not necessarily add another word to the acronym. Just like if I were to write to you about STDs, I would not be talking about Sexually Transmitted Disease [Succotash], but rather multiple Sexually Transmitted Diseases.

[Julene]

Fun, laughter, or amusement.